package com.xz.courseschedule.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.xz.courseschedule.entity.Room;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface RoomMapper extends BaseMapper<Room> {

    //获得班级编号
    @Select("select room_no from room")
    List<Room> selectRoomNo();
}
